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IMPORT
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CCITT D.220
THE INTERNATIONAL
TELEGRAPH AND TELEPHONE
CONSULTATIVE COMMITTEE
GENERAL TARIFF PRINCIPLES
CHARGING AND ACCOUNTING IN
INTERNATIONAL TELECOMMUNICATIONS SERVICES
CHARGING AND ACCOUNTING PRINCIPLES
TO BE APPLIED TO INTERNATIONAL
CIRCUIT-MODE DEMAND BEARER SERVICES
PROVIDED OVER THE INTEGRATED
SERVICES DIGITAL NETWORK (ISDN)
Recommendation D.220
IMPORT Geneva, 1991
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FOREWORD
telecom
telecommunications on a worldwide basis.
The Plenary Assembly of CCITT which meets every four years, establishes
the topics for study and approves Recommendations prepared by its Study Groups.
The approval of Recommendations by the members of CCITT between Plenary
Assemblies is covered by the procedure laid down in CCITT Resolution No. 2
(Melbourne, 1988).
Recommendation D.220 was prepared by Study Group III and was approved
under the Resolution No. 2 procedure on the 22 of March 1991.
___________________
CCITT NOTE
In this Recommendation, the expression SAdministrationT is used for
conciseness to indicate both a telecommunication Administration and a recognized
private operating agency.
c ITU 1991
All rights reserved. No part of this publication may be reproduced or utilized in
any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the ITU.
PAGE BLANCHE
Recommendation D.220
Recommendation D.220
CHARGING AND ACCOUNTING PRINCIPLES TO BE APPLIED TO INTERNATIONAL
CIRCUIT-MODE DEMAND BEARER SERVICES PROVIDED OVER
THE INTEGRATED SERVICES DIGITAL NETWORK (ISDN)
(Melbourne, 1988, revised 1990)
Preamble
This Recommendation sets out the general principles for charging and
accounting to be applied by Administrations for the provision of international
circuit-mode demand bearer services provided over the ISDN. These services are
defined in the relevant CCITT Recommendations.
1 General principles
In principle, there should be no charging and accounting discrimination
between bearer services which require the same network resources and/or functions
to provide the customer with the service requested.
When the network resources required to provide bearer services are
different, the collection charges and accounting rates may depend on the costs of
those resources.
The services covered by this Recommendation are listed in Annex A and are
subject to the same general principles. Unique aspects of the services are also
noted in Annex A.
2 Collection charges
2.1 Collection charges should be set in accordance with the bearer service
requested by the customer. In the event that Administrations elect to provide a
higher capacity connection to meet that request, the customer shall be charged on
the basis of the connection type corresponding to the requested service.
2.2 The network resources necessary to support the requested services may be
different, for example:
2.2.1 the basic utilization charges for a service requiring 64 kbit/s
unrestricted may in principle be at a rate higher than those for a service
requiring 3.1 kHz audio;
2.2.2 the basic utilization charges for a service requiring 3.1 kHz audio may in
principle be higher than those for a service requiring speech only1).
2.3 Measurement of a call for charging purposes should in principle be based
on duration and should commence when the information channel is open for
communication1).
3 Accounting
3.1 Administrations should, by agreement, establish the accounting rate(s)
applicable in a given relation.
The accounting rate should be divided into terminal shares payable to the
Administrations of the terminal countries and, where applicable, into transit
shares payable to the transit Administration. These shares should be established
in accordance with the relevant provisions of the Administrative Regulations [1]
and the CCITT Recommendations.
3.2 Accounting rates should, in principle, relate to the network resources and
functions required to provide the service requested. In exceptional cases when
the requested facilities are not available, and a higher grade facility is
utilized by Administrations, accounting should be based on the facility used.
3.3 Measurement of traffic for accounting purposes should in principle be
based on duration and take into account other relevant CCITT Recommendations.
However, Administrations may agree to consider specific accounting to recover the
costs associated with short duration calls1).
ANNEX A
(to Recommendation D.220)
Categories of circuit-mode bearer services
a) Speech: no unique aspects foreseen;
b) 3.1 kHz: no unique aspects foreseen;
c) 64 kbit/s unrestricted: no unique aspects foreseen;
d) 7 kHz: for further study;
e) Alternate speech/64 kbit/s unrestricted: for further study;
f) 384 kbit/s unrestricted: the call set up charges for this service may
be more significant than for the other services (for further study).
Reference
[1] Final Acts of the World Administrative Telegraph and Telephone Conference,
International Telecommunication Regulations, ITU, Melbourne, 1988.
1) This is for futher study.
1) This is for futher study.
styleref head_footRecommendation
D.220 PAGE1